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    Öğe
    Akçakoca (Düzce, Türkiye)’da 2015-2019 Yillari Arasinda Avcilik Sezonunda Satisa Sunulan Deniz Baliklarinin Fiyat Yönünden Incelenmesi
    (Ordu Üniversitesi, 2021) Yücel, Sennan; Baki, Birol; Topçu, Hasan; Uzun Gören, Gülsen
    Arastirma, 2020 yili Haziran-Temmuz aylarinda Düzce ili Akçakoca ilçesinde balikçi barinagi ve Akçakoca Su Ürünleri Kooperatifinde gerçeklestirilmis olup, deniz baliklarinin aylik fiyat degisimleri tespit edilerek, türler ve yillar arasindaki fiyat iliskilerinin belirlenmesi amaçlanmistir. Akçakoca’da en çok satisi yapilan hamsi (Engraulis encrasicolus ponticus), istavrit (Trachurus trachurus), mezgit (Merlangus merlangus), barbunya (Mullus barbatus), kalkan (Psetta maxima), iskorpit (Scorpaena porcus), kefal (Mugil cephalus), kirlangiç (Chelidonichthys lucerna) ve tirsi (Alosa fallax nilotica) baliklarinin kooperatif araciligi ile satis fiyatlari ve son bes yilin fiyat degerlendirilmesi ayrintili olarak yapilmistir. Akçakoca ilçesinde satisa sunulan baliklarin ortalama fiyatlari ile Türkiye’deki yillik ortalama balik fiyatlari ile karsilastirildiginda; barbunya ve kalkan baligi fiyatlari Akçakoca’da Türkiye ortalamasinin altinda diger baliklarin yillik ortalama fiyatlarinin göreceli olarak Türkiye ortalamasi üzerinde oldugu tespit edilmistir.
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    Öğe
    Effects on Growth of Juvenile Crayfish (Astacus leptodactylus Eschscholtz, 1823) Feeding Different Protein Levels
    (Kastamonu University, 2024) Uzun Gören, Gülsen
    The effects on growth of juvenile crayfish (Astacus leptodactylus Eschscholtz, 1823) fed diets with different protein levels were investigated. The feed groups used in the experiment were trout feed (A), raw potato (B) and raw carrot (C). A total of 160 crayfish were used in the study with an average weight of 0.20±0.01 g and an average length of 2.06±0.03 cm. The experiment was conducted over a period of 12 weeks. At the end of the experiment, it was determined that the average weights of juvenile crayfish fed with different diets were between 0.51±0.07 and 1.18±0.17 g and the average lengths were between 2.45±0.16 and 3.33±0.18 cm. It was observed that the relative changes in length and weight increases were also different between the groups. Statistically, the difference between lengths and groups (F=21.59; p
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    Öğe
    Kalsiyum Kaynagi Olarak Yumurta Kabuklarinin Yavru Kara Salyangozunun (Cornu Aspersum Müller, 1774) Büyüme Performansi Üzerine Etkileri
    (Tokat Gaziosmanpasa University, 2024) Dernekbasi, Seval; Karatas, Emin; Uzun Gören, Gülsen; Çelik, M. Yesim
    Bu çalismada, kalsiyum kaynagi olarak yeme ilave edilen yumurta kabugunun yavru kara salyangozlarin (Cornu aspersum) büyüme performanslari üzerindeki etkisi degerlendirilmistir. Arastirmada limestone (LMS) karsilik membranli (ES) ve membransiz (MES) olarak iki farkli sekilde yemlere ilave edilen yumurta kabuklari kullanilarak 3 deneme yemi hazirlanmistir. Deneme yemleri protein, lipid ve kalsiyum oranlari esit olacak sekilde hazirlanmistir. Deneme 45 gün süre ile yürütülmüs ve 15 günlük peryodlar halinde ara tartimlar yapilarak salyangozlarin büyüme oranlari takip edilmistir. Deneme sonunda en iyi büyüme, agirlik artisi ve SGR membranli yumurta kabugu ilave edilmis yemle beslenen grupta belirlenmistir (P
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    Öğe
    Kerevit Yetistiriciliginde Kalsiyumun Önemi
    (Kastamonu University, 2024) Uzun Gören, Gülsen; Yücel, Sennan
    Dünya çapinda ekolojik ve ekonomik olarak önemli bir tür olan kerevitler (Astacus leptodactylus Eschscholtz, 1823) ülkemiz içinde ihraç ürünleri arasinda yer alan iç sulardan elde edilen bir türdür. Türkiye’de kerevit üretimi dogal su kaynaklari, baraj gölleri ve göletlerden yapilan avciliga dayanmaktadir. Kerevitlerin büyümesinde en önemli elementlerden biri kalsiyumdur. Bu derlemenin amaci, kerevitlerin kabuk degisimi ve büyümesinde kalsiyumun önemi incelenerek, kerevit yetistiriciliginin gelismesine katki saglamaktir.
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    The Evaluation of the Reproductive Performance of Land Snail, Cornu aspersum (Müller, 1774) without Photoperiod in the Non-breeding Season
    (Tokat Gaziosmanpasa University, 2022) Çelik, M. Yesim; Dernekbasi, Seval; Uzun Gören, Gülsen; Karatas, Emin; Karayücel, Sedat
    The purpose of this study was to investige the reproductive success of land snails (Cornu aspersum) without photoperiod during the non-breeding season in the Black Sea Region between December 2019 and January 2020. Snails, which were placed in cold storage for a hundred days, were awakened in December. The reproductive performances were assessed under semi-controlled laboratory conditions using the natural daylight cycle and the ideal temperature and moisture. The experiment was designed as a single group with 3 replications. The experiment was designed 3 replications, with 10 snails in each replicate in total of 30 snails. The reproductive performance of the snails was observed daily and the first mating took place on the 9th day of the study and the first egg-laying was detected in the second week of the study. The fecundity of the snails was 43%. Spawning activity was continued through to 3 weeks. The mean number of eggs, hatching rate and the number of offsprings were 151.13±22.02, 90.33±2.39% and 138.13±21.09, respectively. The mean egg and offspring live weights were 0.034±0.001 g and 0.03±0.007 g, respectively. The findings showed that the reproductive performance was low. In conclusion, reproductive performance is unsuitable for commercial snail production without the photoperiod treatment during the non-breeding season.